MAL-2026-12268

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-mb.product.tgeofencing/MAL-2026-12268.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12268
Published
2026-08-05T09:01:53Z
Modified
2026-08-05T10:06:52.897597280Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-mb.product.tgeofencing (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (471fb9b5c8d45abc59ffda97063561b4882d28109c9959c717fbcd0d9f25c00d)

On require() of this package, index.js loads platform.js which assembles remote hostnames at runtime by concatenating fragmented string arrays to hide them from static scanners. The resolved hosts include oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, and tin/tina/ldr/win.dl.well1.site, with a DNS-TXT chunked base64 fallback channel. The module downloads an opaque binary via https.get, writes it to /tmp or %TEMP% under disguised names impersonating.NET diagnostics (dotnetdiag<hex>.exe,.cache<hex>), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. A sibling file lib/telemetry.js ships the same dropper shape (childprocess require string-split as require("child"+"process"), chmodSync via fs["chmod"+"Sync"], cp.spawn("/bin/sh", ["-c", filePath+" &"])) as a staged secondary payload, though it is not reached from index.js in this version. The fetched-and-executed binaries, obfuscated destinations, disguised filenames, and DNS-TXT fallback do not match the package's declared Tgeofencing purpose. The package name also impersonates a Tinkoff internal-scope package, consistent with a dependency-confusion lure.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T09:01:53Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-014515",
            "import_time": "2026-08-05T09:28:21.195339293Z",
            "sha256": "471fb9b5c8d45abc59ffda97063561b4882d28109c9959c717fbcd0d9f25c00d",
            "versions": [
                "20.9.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-mb.product.tgeofencing

Package

Name
tinkoff-statist-browser-typed-client-mb.product.tgeofencing
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-mb.product.tgeofencing

Affected ranges

Affected versions

20.*
20.9.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "tinkoff-statist-browser-typed-client-mb.product.tgeofencing-20.9.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-n1TPk0Yp2qF0Axl0xxS90F+RBqBabA5uWCFvQ5v0hU7N8AfQfH1gOURafGb9/1jJ722sl2WvMiE+vSC3aGBp/g==",
                "sha1": "c2cce7dbac23cbc89f66d5d30375653947f01822"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "42a1a65a16a971188bb0a7f48717441af65bf263338082d4f79ca4981fb352483b2efc",
            "sha256": "64002d01b7763d58fec2efc72b907e0ce19272c3ea6e667d2893f54e6965b09b",
            "path": "_platform.js"
        },
        {
            "tlsh": "0d835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "d280fb2883e7e17f8fd4f1a6dc884a6f2e644b0873c2b02af8b361f35bce982e",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-mb.product.tgeofencing/MAL-2026-12268.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]